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post #41 of 62
You have debunked my issue with PWM fairy well Jack.

Still an other issue makes PWM control not optimal for WC'ing:

Your CPU temps will fluctuate a lot faster than your water temps.
This would cause your fan curve to be a lot more abrupt and noticeable.

I just find that the extra cost of PWM fans isn't worth it.
Most good PWM fans will have a price around or above GT fans.

So you end up paying more money for fans that aren't as good at GT fans. And the controlling of them is not optimal either.
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post #42 of 62
Easy way to distinguish if reducer or pulser is to attach some less with it. I put some dark side uv light with my old adjust 108 on low speed . The light is flickering faintly. On my lamptron 615 it doesn't flicker
post #43 of 62
Quote:
Originally Posted by coalminer071 View Post

Easy way to distinguish if reducer or pulser is to attach some less with it. I put some dark side uv light with my old adjust 108 on low speed . The light is flickering faintly. On my lamptron 615 it doesn't flicker

That is because the flickering of the Lamptron is too fast to be seen with the naked eye.
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post #44 of 62
Quote:
Originally Posted by PepeLapiu View Post

You have debunked my issue with PWM fairy well Jack.

Still an other issue makes PWM control not optimal for WC'ing:

Your CPU temps will fluctuate a lot faster than your water temps.
This would cause your fan curve to be a lot more abrupt and noticeable.

I just find that the extra cost of PWM fans isn't worth it.
Most good PWM fans will have a price around or above GT fans.

So you end up paying more money for fans that aren't as good at GT fans. And the controlling of them is not optimal either.

I think you knew what you were doing .... just the way it was reading, was coming across well.

I haven't seem the fan speeds changing that much .... in fact one of the things stuck in my head now .... and this will shock you..... I'm debating whether fan control is worth my T & E. Look at it this way:

1. My fans are dead silent at 850 rpm
2. My fans never go above 850 rpm

So why not just leave them at 850 rpm ?

I have I spent hours upon hours testing and tweaking fan curves ..... cause like you, I'm a geek ..... it's not about whether I need it, it's about the challenge of tweaking it to the best possible condition .... it's fun.

PWM from an engineering / efficiency standpoint is better .... the obligatory geek statement being made, from a practical standpoint, it just doesn't matter.....and if ya saving $5 per fan for $16 fans, that gets you from a 770 to a 780 and that certainly is practical. With MoBo manufacturers moving to 4 pin headers, i think it's just a matter of time before they are PWM .... I'm gonna assume at least that at some point, some MoBo manufacturer will want to distinguish themselves and actually make those OPT_1 thru OPT_3 temp sensors control those OPT_1 thr OPT_3 fans.

But here's where it gets attractive.....Your MoBo headers are curtailed by low amp readings, typically 1 watt. However, if this fan header was PWM, true PWM, then you could feed a Phanteks PCB which can handle 11 fans. The PCB has a PSU connector to supply extra voltage if ya need more than the header can provide..... however, if its voltage contolled header, then the 12V PSU feed will override that. However if it's PWM, then it works just fine.
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post #45 of 62
Thread Starter 
I have a Swiftech PWM splitter. What do you use to get thermal input?
post #46 of 62
Best thermal input for a PWM pump would have to be the CPU fan header, which uses CPU temps.
But yoy'll have to use PSU power, not from the header.
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post #47 of 62
Thread Starter 
Quote:
Originally Posted by PepeLapiu View Post

Best thermal input for a PWM pump would have to be the CPU fan header, which uses CPU temps.
But yoy'll have to use PSU power, not from the header.

JackNaylorPE said he had thermal sensors controlling his PWM not a board header. Just wondering how to accomplish this.
post #48 of 62
Quote:
Originally Posted by frunction View Post

JackNaylorPE said he had thermal sensors controlling his PWM not a board header. Just wondering how to accomplish this.

You misunderstood or Jack mispoke.
With PWM you can't use your temp sensors, unless you get Aquaero 6.

Unless some mobos suddenly came out with that feature, you are stuck with CPU or GPU temps.

Using GPU temps is probably not a good idea.
Edited by PepeLapiu - 3/12/14 at 3:51pm
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post #49 of 62
Thread Starter 
Yes, I see that now. I'm thinking an aquaero 5 LT would be a better solution to control fans and pumps. Looks quite impressive for $75.

Since I went with the MPC35x pump, I'm not sure there's a way I can control it based on temps (not cpu) unless I get this type of part. The bitfenix can do fans no problem with the temp sensors, but a pump...

Also I did buy a couple of bitspower water temp sensors to run the fans off of.
Edited by frunction - 3/12/14 at 9:10pm
post #50 of 62
Im not familiar with the Aqua 5.
But it's an undervolting controller.
Some swear by undervolting, not me.
I have had several undervolting controllers (not Aqua ones) and I think it's not a great idea, not to me anyways.
If you want to control two pumps with it, you will most likely need to get a waterblock just for the controller. Those things produce a lot of heat.

I think for an other 25$, you can get a CW611 to control all your pumps, and fans, and still have channels to spare.
6 channels at 36W is 215W of power.

Or if you want to save for ma\ual control, I know one Lamptron does 4x 50W, for a lot cheaper, but it's manual
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